ASTM A193 Grade B8MA Bolts, Stud Bolts, Fasteners

Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications

ASTM A193 specification covers alloy and stainless steel bolting for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. Several grades are covered, including ferritic steels and austenitic stainless steels designated B5, B6, B7, B8, B8M, etc. Selection will depend upon design, service conditions, mechanical properties, and high temperature characteristics. This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable A193M specification designation (SI units), the inch-pound units shall apply

ASTM A193 Grade B8MA Raw Material

Grade Raw Material Description
B8MA AISI 316 Stainless Steel, Carbide Solution Treated in Finished Condition

ASTM A193 Grade B8MA Properties

ASTM A193 Grade B8MA Chemical Composition

Carbon, max Manganese, max Phosphorus, max Sulfur, max Silicon, max Chromium Molybdenum
0.08 2.00 0.045 0.030 1.00 16.0 - 18.0 2.00 - 3.00

ASTM A193 Grade B8MA Mechanical Properties

Grade Diameter Tensile Strength Yield Strength Elongation Reduction Hardness
Grade B8MA All Diameters 515 205 30 50 192 HBW or 90 HRB

ASTM A193 Grade B8MA Bolt Marking

Class Manufacturer's Mark Grade Symbol
Class 1A BPF B8D or B8MA

Recommended Nuts & Washers

Bolting Grade Nut Grade Washer Grade
ASTM A193 Grade B8MA ASTM A194 Grade 8MA SS 316

ASTM A193 Grade B8MA Bolting

Hex Bolt Heavy Hex Bolts Stud Bolts Threaded Rods Anchor Bolts
Eye Bolts Socket Head Cap Screws Countersunk Screws J Bolts Square Head Bolts